Mergus merganser
Silhouette: Andy Wilson · PhyloPic
In 3 days ~50% in a week ~80%
The common merganser or goosander (Mergus merganser) is a large sea duck of rivers and lakes in forested areas of Europe, Asia, and North America. The common merganser eats mainly fish. It nests in holes in trees. The name "common merganser" is used in North America, while "goosander" is used in Eurasia.
The first formal description of the common merganser was written by Swedish naturalist Carl Linnaeus in 1758 in the 10th edition of his Systema Naturae. He introduced the current binomial name Mergus merganser. The genus name is a Latin word used by Pliny and other Roman authors to refer to an unspecified waterbird, and merganser is derived from mergus and anser, Latin for "goose". In 1843 John James Audubon used the name "Buff-breasted Merganser" in addition to "goosander" in his book The Birds of America.
The three subspecies differ in only minor detail: It is 58–72 cm (23–28+1⁄2 in) long with a 78–97 cm (30+1⁄2–38 in) wingspan and a weight of 0.9–2.1 kg (2 lb 0 oz – 4 lb 10 oz); males are on average slightly larger than females, but with some overlap. Like other species in the genus Mergus, it has a crest of longer head feathers, but these usually... Wikipedia →
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Calgary | 🇨🇦 Canada | |
| 2 | Helsinki | 🇫🇮 Finland | |
| 3 | Lanzhou | 🇨🇳 China | |
| 4 | Sacramento | 🇺🇸 United States | |
| 5 | Taiyuan | 🇨🇳 China | |
| 6 | Sendai | 🇯🇵 Japan | |
| 7 | Munich | 🇩🇪 Germany | |
| 8 | Birmingham | 🇬🇧 United Kingdom | |
| 9 | Warsaw | 🇵🇱 Poland | |
| 10 | Manchester | 🇬🇧 United Kingdom |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Prague Zoo | 🇨🇿 Czechia | |
| 2 | Dresden Zoo | 🇩🇪 Germany | |
| 3 | Zoo Pilsen | 🇨🇿 Czechia | |
| 4 | Bronx Zoo | 🇺🇸 United States | |
| 5 | Toledo Zoo | 🇺🇸 United States | |
| 6 | Berlin Zoological Garden | 🇩🇪 Germany | |
| 7 | Centro Cicogne e Anatidi | 🇮🇹 Italy | |
| 8 | Cologne Zoological Garden | 🇩🇪 Germany | |
| 9 | London Zoo | 🇬🇧 United Kingdom | |
| 10 | Oasi Naturalistica di Sant'Alessio | 🇮🇹 Italy | |
| 11 | Queens Zoo | 🇺🇸 United States | |
| 12 | Stone Zoo | 🇺🇸 United States | |
| 13 | Bayerwald-Tierpark Lohberg | 🇩🇪 Germany | |
| 14 | Alpenzoo Innsbruck | 🇦🇹 Austria | |
| 15 | Central Park Zoo | 🇺🇸 United States | |
| 16 | Aquarium Berlin | 🇩🇪 Germany | |
| 17 | Rákosův pavilon | 🇨🇿 Czechia | |
| 18 | Velemlokárium | 🇨🇿 Czechia | |
| 19 | Cologne Zoo Aquarium | 🇩🇪 Germany | |
| 20 | Les Oiseaux du Marais Poitevin | 🇫🇷 France |
Possible
About 20% of wildlife watchers report a Common Merganser sighting in Daejeon on a given day, based on 27 verified sightings from GBIF citizen-science data. It is the 30th most-seen of the 69 birds we can rate there. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.
January
In that month about 50% of wildlife watchers report a Common Merganser in Daejeon on a given day, against about 10% in April to October, the lowest months. That is one of Daejeon's driest months, with about 25 mm of rain against 320 mm in July.
Between 3 and 6 pm
Across all the parks we cover, that three-hour window holds the most Common Merganser sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
12th of 70
Of the 70 cities where we can rate Common Merganser sightings, Daejeon ranks 12th at about 20%. The best odds are in Calgary (Canada, about 50%), Helsinki (Finland, about 40%) and Lanzhou (China, about 30%).
Same family: Anatidae
The closest relatives of the Common Merganser that you can see in Daejeon (family Anatidae, Ducks, Geese, and Swans) are Eastern Spot-billed Duck (about 80%), Eurasian Teal (about 40%) and Mallard (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Common Merganser is recorded against all the birds logged in Daejeon (27 verified sightings), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
